UPS对比.ppt

Liquid cooled weak points APC SILCON: SL APC Power StruXture RIELLO: MULTIDIALOG Newave: Conceptpower * 10-20-30KVA p.f. 1 Transformerless technology Battery included Not parallelable No evo PLUS (Std THCD 10%) Short BUT with internal battery (7’) Range up to 30kVA No DSP Standard input THCD 10% Unity output power factor IMV (GE Digital Energy): LanPro 10-15-20-30-60 to 500KVA p.f. 1 (0,9 for 60kVA and above) Transformer technology No battery included Old technology No evo PLUS (Std THCD 35%) No DSP Unity output power factor IMV (GE Digital Energy): Site Pro 10-15-20-30KVA p.f. 0.8 ? Liquid cooled ? Low efficiency (87%) ? Low overload (150% for 1 sec.) ? Step charger only ? Parallel ? ? Range up to 30kVA ? No DSP ? Standard input THCD 3% ? Wide input range ? Rectifier input w/o neutral MGE: Galaxy 3000 Transformerless technology Battery included Lower reliability: Compare to the classica air cooled UPS in MGE solution there is the same number of fans but there is an additional liquid pump. Therefore this is an additional mechanical device with limited life and potential failure. Moreover the association of liquid qith high voltage is dangerous. This is proved by the number of plastic shelves which are placed between the UPS and the battery to avoid any possible liquid leakage into the battery racks which may turn into dangerous short circuits. On the other hand the liquid level shall be controlled, adding some extra maintenance compare to air cooled UPS. Bigger dimensions: In spite of using liquid cooled system the footprints and volumes of Galaxy 3000 are bigger then DIGYS evo. Therefore MGE can not claim that this technology allows smaller dimensions. Lower overload capability: MGE claims that liquid cooling allows the components to work at lower temperature. Being Galaxy 3000 overload capability lower then DIGYS evo means that they have less margin in the components which are therefore working at higher temperature. 20-30-40-50-60 to 200KVA